Base for tilting chairs



NOV. 4, 1947. I H, w, BOLENS 2,430,043

BASE FOR TILTING CHAIRS i original Filed Aug. 3, I1940 IN VEN TOR.

#HE/PV W .BOE/VS.

Patented Nov. 4, 1947 BASE FOR TILTING CHAIRS Harry W. Bolens, PortWashington, Wis., assignor, by mesne assignments, to The Seng Company,Chicago, Ill., a corporation of Illinois Original application August 3,1940, Serial No. 350,310. Divided and this application March 15, 1944,Serial No. 526,515

3 claims. (c1. 24g- 194)y This invention relates to an improvement intilting chairs, and more particularly to an improvement in the base ofsuch chairs and in the chair iron which supports the seat on the basefor tilting movement.

The present application is a division of my application for Tiltingchairs, filed August 3, 1940, serial No. 350,310.

One of the objects of the invention is to provide a hub which may befabricated from sheet metal parts, but which is extremely strong, ruggedin assembly, durable, and comparatively inexpensive to manufacture.

Other objects and advantages reside in certain novel features of theconstruction, arrangement, and combination of parts, which will behereinafter more fully described and particularly pointed out in theappended claims, reference being had to the accompanying drawing forminga part of this specification, and in which:

Figure 1 is a view in side elevation showing the metal base to which thelegs are connected and upon which the spindle of the chair iron issupported;

Figure 2 is a view in transverse, vertical cross section taken on line2-2 of Figure 3; v

Figure 3 is a view in bottom plan of the metal base shown in Figures 1and 2;

Figure 4 is a view thereof in transverse, horizontal cross section takenon line 4 4 of Figure 1; and

Figure 5 is a fragmentary View in section, taken on line 5 5 of Figure3.

Referring to the drawing, the hub comprises a central sleeve or tube Bwhich may be rolled from a piece of sheet metal and which has its upperends flanged outwardly as at 1. A strengthening and reinforcing ring orcap 8 is disposed on the flange 1, and this ring or cap 8 is spun aroundthe outer edge and under the margin of the flange l, as indicated at 9.A circular top plate I0 is provided and has a central opening throughwhich the tube 6 extends and to which the tube is snugly fitted. Themargin of the opening of the top plate I0 is engaged with and supportedby an outwardly directed corrugation 6 provided on the tube 6. Adouble-flanged sleeve or ferrule IB surrounds the portion of the tube 6located between the top plate I0 and its flange 'I and serves to holdthe top plate against its corrugation and to stiffen and reinforce theflange 1. Leg-engaging brackets I2 are provided, and in the presentinstance there are four in number. They are of similar construction andeach is of shallow V- shaped formation in horizontal cross section,although at spaced intervals along the length of each the leg bracketribs or bosses I3 are pressed out therefrom to stiffen and strengthenthese brackets. The upper end of each leg bracket is provided withintegral attaching lugs I4 which extend through suitable slots providedtherefor in the top piece I8 and are upset into secure and rigidengagement with the top piece. The lower end of each bracket plate isprovided with a slot to adapt it to be intertted and interconnected withthe generally triangularly shaped attaching arm I5 provided therefor onthe lower plate I6 of the hub. The plate I6 has a central openingthrough which the tube 6 projects.

In the assembly the legs are disposed between the confronting portionsof adjacent bracket plates and they are secured in this position byscrews I8 which extend through openings provided in the top piece andare threaded into the legs. A hub construction of this character may bemanufactured with facility and at comparatively little expense fromsheet metal, and yet provides an extremely strong and ruggedconstruction and one which will stand up over a long period of time Inmanufacturing the hub of the base the tube 6 is first formed into acylinder with its upper end unflanged. The corrugation 6', usually aninterrupted corrugation, is then formed. The top plate IIJ is thenassembled with the tube, the previously flanged ferrule I0' slipped overthe upper end of the tube, the upper end of the tube 6 flangedoutwardly, and the reinforcing plate 8 then assembled with these partsand spun into place. The leg brackets and bottom -plate are thenassembled with the other elements.

While I have shown and described one construction in which the inventionmay be advantageously embodied, it is to be understood that theconstruction shown has been selected merely for the purpose ofillustration or example, and that various changes in the size, shape,and arrangement of the parts may be made without departing from thespirit of the invention or the scope of the subjoined claims.

I claim:

1. A hub for the base of a tilting chair comprising a, centrallydisposed tube having its upper end flanged outwardly, a double flangedferrule on said tube, a reinforcing cap formed over said flanged upperend on the tube and a ilange on said ferrule, a corrugation on saidtube, a top plate rigidly interconnected with the tube and held betweensaid corrugation and the other flange of said ferrule, leg bracketshaving lugs staked to the top plate, and a. bottom plate havingattaching arms intertted with the lower ends of the leg brackets andstaked thereto.

2. A hub for the base of a. tilting chair comprising a central tubehaving its upper end anged upwardly, a reinforcing cap having an upperportion formed over said ilanged upper end of the tube to provide abearing member for receiving the thrust forces placed on a chair spindlecarried by said hub and a lower portion formed under said flanged upperend of the tube to hold said cap in position, a top plate interconnectedwith the tube adjacent its upper end, Va bottom plate mounted on thelower end of the tube, and leg brackets extending between and secured t0said plates.

3. A hub for the base of a, tilting chair comprising a central tube, atop plate rigidly interconnected with and supported on the upper endportion of the tube, a bottom plate mounted on the lower end of thetube, and leg-engaging '4 brackets having sides forming a shallowV-shaped cross section extending between said plates, the confrontingsides of adjacent brackets forming a socket for receiving a respectiveleg, said leg brackets having their upper ends fastened to theREFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 2,168,810 Sheldrick Aug. 8, 19391,459,138 Bolens June 19, 1923

